Animation showing the flow direction through a hypothetical three-lobe Roots blower or lobe pump in cutaway. The rotors have a slight twist. Blender 3D source files: https://github.com/slashme/RootsAnimation
The compression action of a twin-screw compressor with a six-lobe female screw and a five-lobe male screw - the compression of one pair of cavities is highlighted: air is sucked in through the intake port, compressed (shown by the colour change from cyan to red) and released through the outlet port. Blender source file available from the GitHub repository: https://github.com/slashme/RootsAnimation/blob/master/ScrewCompressor.blend
A W-type external-thread collet being pulled into its spindle seat with a drawbar, clamping and then releasing a shaft. Source file available at GitHub
